EP 0824026 B1 20051130 - Radiation treatment apparatus and method
Title (en)
Radiation treatment apparatus and method
Title (de)
Bestrahlungsbehandlungsvorrichtung und Verfahren
Title (fr)
Dispositif de radiothérapie et procédé
Publication
Application
Priority
US 69545796 A 19960812
Abstract (en)
[origin: US5684854A] A method of establishing coincidence between a field size of a light field used in a setup mode of a radiation system and a field size of a radiation field used in an operation mode of the system includes providing automatic adjustment of field-defining structure to compensate for differences in optical properties of the light and the radiation. A light beam passing through the field-defining structure typically exhibits greater scattering than an X-ray beam passing through the structure. For each of a number of different settings of the field-defining structure, the difference between the field sizes of the light and the radiation are determined and recorded. Then, for a particular desired field size, the field-defining structure can be automatically adjusted to provide compensation. In the preferred embodiment, the field-defining structure includes jaws of a collimator of a radiation system and the determination of field size differences of the light and the radiation occurs for each of various energy level settings of the radiation system.
IPC 1-7
IPC 8 full level
A61N 5/10 (2006.01)
CPC (source: EP US)
A61N 5/1049 (2013.01 - EP US); A61N 2005/1056 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
US 5684854 A 19971104; CA 2212707 A1 19980212; CA 2212707 C 20050510; CN 1168513 C 20040929; CN 1176143 A 19980318; DE 69734751 D1 20060105; DE 69734751 T2 20060817; EP 0824026 A2 19980218; EP 0824026 A3 19990512; EP 0824026 B1 20051130; JP 4188438 B2 20081126; JP H1076019 A 19980324
DOCDB simple family (application)
US 69545796 A 19960812; CA 2212707 A 19970808; CN 97117669 A 19970812; DE 69734751 T 19970807; EP 97305999 A 19970807; JP 21690097 A 19970812